 Jacob Bertus Polak - CohenBorn 19-2-1897 Leeuwarden-Friesland, Netherland. Occupation: Religion teacher. Son of Herman Jacob Polak - van Rhijn and Alida Elisabeth Dorothea Cohen - Jacobs Marriage/ Related to:  Hanna Clara van Gelder - CohenBorn 4- aug 1897 Rotterdam, Netherland. Occupation: Religion teacher. Daughter of Salomon Nathan van Gelder - Franzie and Jeannette Cohen | |||